network: Only create message delay timer if FAKE_WAN_DELAYS are active

Otherwise using multiple replica threads will result in an Exception.

src/refit/communication/REFITNetworkEndpointWorker.java

@@ -60,7 +60,9 @@ public class REFITNetworkEndpointWorker extends REFITSchedulerTask {
 		if (address.nodeID != nodeID) {
 			throw new IllegalArgumentException("Got connection for wrong node!");
 		}
+		if (REFITConfig.FAKE_WAN_DELAYS) {
 			timer = newTimer(this::timeout);
+		}
 		this.address = address;
 		try {
 			connection.init(socketChannel);